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When sedimentary rocks are first laid down their layers (bedding) are tangential to the earths surface (essentially they look flat).
They remain like this unless two of the earths continental plates on which the flat bedded rocks are deposited crash together. When they crash together, the layers are squashed horizontally and become deformed as a result.
Frequently this deformation causes the layers to fold (like scrunching paper) to accommodate and the result is folded rocks.
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∙ 14y ago
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What are synclines?
Synclines are downward arches of folded rocks.
Is a crack on folded rocks called a focus?
false
How can older rocks be found on top of younger rocks in a cross-section?
If the strata layers are folded or tilted then the older rocks can be found on top of the younger rocks in a cross-section.
Why is it difficult to interpret the rock record of precambrian time?
It's rocks are severely bent and folded.
A fold in which the oldest rock layers are in the center of the fold is?
If rocks are folded, the folding is younger that the youngest rock affected. If they are folded into a syncline (a U-shaped fold) the youngest rocks are in the core of he fold. The opposite is true for an anticline (a big dome-shaped fold).
When do folded rocks formed?
sedimentary rocks
What are synclines?
Synclines are downward arches of folded rocks.
Is a crack on folded rocks called a focus?
false
What are the Himalayas made of?
Mount Everest is made up of sedimentary rocks.
How can older rocks be found on top of younger rocks in a cross-section?
If the strata layers are folded or tilted then the older rocks can be found on top of the younger rocks in a cross-section.
One reason the Precambrian rock record is difficult to interpret is because its rocks?
It's rocks are severely bent and folded.
What type of map is used to identify folded or broken rocks?
Topographic maps
What type of mountains form in where rocks are being pushed together?
Folded Mountain
What are up-folded sedimentary rocks?
They are the part of sedimentary rocks that forms the crest of a folding during deformation. They are also called Anticlines.
Why are the alps where they are?
The two continents of Africa and Eurasia pushed together and folded the rocks into mountains.
Why is it difficult to interpret the rock record of precambrian time?
It's rocks are severely bent and folded.
What type of mountain form in areas where rocks are being pushed together?
rocky moutains form when rocks are being pushed together.
